Fit Notebook

Does desktop ram fit into notebooks and if it can is it as easy to install?
i have a really crappy dell desktop but i just got tons of ram for it. i am planning on getting a new hp notebook and am wondering if it is as easy to install ram into a notebook as it is into a desktop. i’m not really good with computers so is it very easy?
They usually use different types, I have seen some very rare instances where a notebook used desktop RAM, but it is not likely.
Bell Tech Notebook – Fit Systems